"The Monk and the Spider"

Once upon a time, there was a monk who had trouble meditating. Whenever he tried going into meditation, a giant spider would appear. No matter what he did, he could not get rid of it.

At his wit's end, the monk sought help from his master. The master instructed him to prepare a brush at his side for the next attempt. When the spider appeared again, he was to use the brush to draw a circle on it.

The monk followed these instructions and attempted meditation. Sure enough, the giant spider came back. The monk followed the plan and drew a circle on the monster. As soon as he did so, the spider disappeared, and he was able to resume meditation in peace.